WO2008139403A1 - Temps de démarrage du disque d'un lecteur optique - Google Patents

Temps de démarrage du disque d'un lecteur optique Download PDF

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Publication number
WO2008139403A1
WO2008139403A1 PCT/IB2008/051857 IB2008051857W WO2008139403A1 WO 2008139403 A1 WO2008139403 A1 WO 2008139403A1 IB 2008051857 W IB2008051857 W IB 2008051857W WO 2008139403 A1 WO2008139403 A1 WO 2008139403A1
Authority
WO
WIPO (PCT)
Prior art keywords
record carrier
optical
optical record
initial startup
optical drive
Prior art date
Application number
PCT/IB2008/051857
Other languages
English (en)
Inventor
Tek Seow Loi
Yu Zhou
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP08763082A priority Critical patent/EP2147431A1/fr
Priority to CN200880015502A priority patent/CN101681638A/zh
Priority to US12/599,357 priority patent/US20100302923A1/en
Priority to JP2010507049A priority patent/JP2010527093A/ja
Publication of WO2008139403A1 publication Critical patent/WO2008139403A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information

Definitions

  • the subject matter relates to optical drives, and more specifically, to method for reducing the time taken by the optical drive to load an optical disc into the optical drive.
  • US patent 2005/0002308 discloses a recorder for recording data on a multilayer optical recording medium. Loading of the multi- layer optical recording medium into the recorder (i.e. starting the optical recording medium to be ready for recording) usually can take on an average about 12 sec and can vary up to about 15 to 20 seconds. This can be quite annoying for the end user.
  • a method of loading an optical record carrier into an optical drive comprises using a subset of a set of initial startup procedures for subsequent startups, the set of initial startup procedures comprising procedures that the optical drive requires to start recording or reading the optical record carrier.
  • An optical drive comprising a control unit arranged to use a subset of a set of initial startup procedures for subsequent startups, the set of initial startup procedures comprising procedures that the optical drive requires to start recording or reading the optical record carrier is disclosed.
  • Fig. 1 schematically shows an exemplary optical drive used for recording/reading data from an optical record carrier according to the present subject matter.
  • An optical record carrier e.g. a DVD, comprises at least one track either in the form of a continuous spiral or in the form of multiple concentric circles, wherein information may be stored in the form of a data pattern.
  • the optical record carrier may be of a Recordable (R) or a Rewritable (RW) type, wherein information may be stored or recorded, such as DVD+RW, DVD-RW, DVD+R, HD-DVD and BD-RE (single and multilayer).
  • R Recordable
  • RW Rewritable
  • the information is generally recorded/played back by using radiation beams such as laser beams.
  • the optical record carrier 10 is constant angular velocity (CAV) controlled or constant linear velocity (CLV) controlled by a spindle motor 12.
  • An optical pick-up unit 14 records data on the optical record carrier 10 by using laser light (at a recording power value) emitted from a laser diode.
  • the data is supplied to an encoder unit 18 and the data encoded by the encoder unit 18 is supplied to a laser diode-driving unit 16.
  • the laser diode-driving unit 16 generates a drive signal based on the encoded data and supplies the drive signal to the laser diode of the optical pick-up unit 14.
  • a control signal from a control unit 24 is supplied to the laser diode-driving unit 16 so that the recording strategy and the recording power are determined by the control signal.
  • the laser diode of the optical pick-up unit 14 emits laser light of a read power (read power ⁇ record power), and the reflected light is received.
  • the received reflected light is converted into an electrical signal and a read RF signal is obtained.
  • the read RF signal is supplied to an RF signal- processing unit 20.
  • the RF signal-processing unit 20 comprises an equalizer, a binarizing unit, a phase-locked loop (PLL) unit, and binarizes the read RF signal, generates a synchronous clock, and supplies these signals to a decoder unit 22.
  • the decoder unit 22 decodes data based on these supplied signals and outputs the decoded data as read data.
  • the optical drive 100 includes a circuit (for data readout) for controlling the focus servo or tracking servo by producing a tracking error signal or a focus error signal respectively, and a wobble signal formed on the optical record carrier 10 (e.g. for use in address demodulation or for controlling the number of rotations).
  • the servo control structures are identical to those in conventional drive systems and therefore are not described in detail.
  • the construction shown in Fig. 1 only illustrates portions related to the general operation of the optical drive.
  • the description and detailed explanation of servo circuits for controlling the optical pick-up unit, the spindle motor, the slide motor, and the control circuits are omitted, because they are constructed in a similar manner as in conventional optical drives. Loading of the optical record carrier 10 (Cf. Fig. 1) into the optical drive 100
  • a method of loading an optical record carrier into an optical drive comprises using a subset of a set of initial startup procedures for subsequent startups, the set of initial startup procedures comprising procedures that the optical drive requires to start recording or reading the optical record carrier.
  • the idea here is to have a procedure that learns certain optical record carrier information and forms a subset of the initial optical record carrier startup procedure.
  • the subset of the initial optical record carrier startup procedure is used to intelligently circumvent parts of the normal optical record carrier loading steps.
  • the time taken to subsequently load the optical record carrier into the optical drive is reduced.
  • calibration of the focus offset and the tilt offset to improve the optical record carrier readability which is carried out during the general identification of the optical record carrier can easily take about 1.8 to 2.0 seconds.
  • the optical record carrier startup time can be reduced if this calibration step can be omitted.
  • the method includes grouping at least a portion of information related to the subset of the set of initial startup procedures and storing the grouped information in a single location on the optical record carrier for a single read access during subsequent startups.
  • Storing the grouped information (i.e. quick load information) in a single location allows the optical drive 100 to access all the required information in a single read access and thereby perform faster loading of the optical record carrier 10. Since the required information for the optical record carrier startup is accessed and read in a single read operation, the number of access and read operations are reduced which in turn reduces the startup time. If the information related to the subset of the set of initial startup procedures is not available on the optical record carrier, that means, the optical record carrier is being loaded into the optical drive the first time. In such a case the optical drive will generate the information related to the subset of the set of initial startup procedures that can be used to reduce the time taken by the optical drive to subsequently load the optical record carrier into the optical drive.
  • the subset of the set of initial startup procedures comprises at least two of the initial startup procedures selected from
  • Calibration of the focus offset and the tilt offset to improve the optical record carrier readability usually takes about 1.8 to 2.0 seconds.
  • the optical record carrier startup time can be reduced if this calibration step can be skipped (or omitted).
  • the optical drive can revert to performing the normal calibration. This is only needed when the optical record carrier has high tilt. Further, the last recorded table of content start address on the optical record carrier can be accessed based on the unique optical record carrier identifier without performing multiple readouts during startup.
  • the optical drive can use the pre-calibrated focus offset and/or the pre-calibrated tilt offset value to configure the servo for optimal performance.
  • the optical drive can use the unique optical record carrier identifier to reference the last table of content address and the last user area recorded address. With this address information, the optical drive can directly read the last table of content (for the basic optical record carrier structure) thereby omitting the rest of the loading steps. This can reduce the overall optical record carrier startup time.
  • the searching of the user data area can be skipped by performing only an optical record carrier integrity check during startup.
  • the last recorded user area address herein referred to as eeLRA kept in the non- volatile memory can be used to check the integrity of the recording.
  • the eeLRA can be cleared to zero.
  • the eeLRA can be updated to the actual last address.
  • the optical drive will find that the eeLRA value is zero. This immediately flags the optical drive to perform a user area next writable address searches. With this check in place, the optical drive does not need to perform unnecessary address search which helps to reduce the optical record carrier loading time for most situations.
  • the last recorded table of content address on the optical record carrier can be updated upon completing a new recording.
  • the optical drive can update a new entry of the table of contents to the recordable optical record carrier. The location of this new table of contents entry can be kept in the optical drive's non- volatile memory.
  • the optical drive can use the unique optical record carrier identifier to retrieve the location of the latest table of contents entry without the need to search the optical record carrier
  • the last table of content stop address can be stored in a memory of an optical drive associated with an optical record carrier type.
  • the stored last table of content stop address can be used upon loading the optical record carrier type into the optical drive.
  • the optical drive can read the table of contents from the beginning of the table of contents defined address.
  • the optical drive can read the control data zone in the case of DVD-R disc.
  • Table 2 Loading optical record carrier 10 into the optical drive 100 (Cf. Fig. 1) without "quick load information"
  • step 2 and step 3 are skipped.
  • the step to read the "quick load information" from the disc can fail. This can force the optical drive to carry out step 5 and 6 (same step as 2 and 3) before following the original disc loading sequence.
  • step 5 and 6 the optical drive will have enough information to store the "quick load information" to the disc (in specific location in the lead-in). This can allow the optical drive to perform faster loading of the same disc in the future.
  • Table 3 shows loading a DVD according to an embodiment of the disclosed method (i.e. with the quick load information).
  • the "quick load information" is available, certain steps of the original loading steps are skipped in order to improve the DVD loading time.
  • the optical drive can read the "quick load information". With this information, the optical drive will be able to immediately update its servo settings for tilt offset and focus offset with the optimal values found in the "quick load information". Steps 3 and 6 are skipped because the optical drive already has a copy of the address in pre-groove/land pre-pit information and the control data zone information from the quick load information" block.
  • the "quick load information" contains the unique disc identifier. This unique disc identifier is used to skip steps 4 and 7 in the original loading sequence for recordable disc only. Steps 4 and 7 are not carried for rewritable disc, so this part of the improvement is not applicable for rewritable disc.
  • steps 4 and 7 are skipped because the optical drive will now be able to use the non- volatile memory to store the address of the last table of contents entry as well as the last recorded address of the user data area using the unique disc identifier as the reference key. Without the unique disc identifier, values stored in the optical drive's non- volatile memory cannot be accurately applied to a specific disc.
  • the optical drive When there are changes to the layout structure of a recordable optical record carrier, the optical drive will update a new entry of the table of contents to the recordable optical record carrier. The location of this new table of contents entry will be kept in the optical drive's non- volatile memory. When the same optical record carrier is loaded, the optical drive will use the unique disc identifier (read from the "quick load information") to retrieve the location of the latest table of contents entry without the need to search the optical record carrier.
  • the optical drive will also store the last recorded address of the user data area in its non- volatile memory.
  • the optical drive will use the unique disc identifier to retrieve the last recorded address from its non- volatile memory. This will allow the optical drive to skip step 7.
  • the following method can be used. When recording is started, the last recorded address in the non- volatile memory will be cleared to zero to denote that recording has started. When recording is stopped, the actual last recorded address is stored into the optical drive's non- volatile memory. In the event that a recording was started but was not completed (i.e.
  • the optical drive will find that the last recorded address value in the non- volatile memory is zero. By seeing a value of zero, the optical drive will know that the recording on this did not complete successfully and that the information contained in the table of content is not up-to- date. In order to reflect the latest disc layout structure, the optical drive will need to perform a next writable address search in the user data area. With this data area integrity check in place, the optical drive will be able to skip the data area search step for most situations when recordings have completed successfully.
  • the optical drive 100 can be adapted to reduce the optical record carrier startup time as disclosed in the embodiments.
  • the optical drive 100 includes a control unit 24A arranged to use a subset of the set of initial startup procedures (i.e. quick load information) for subsequent startups, the set of initial startup procedures comprising procedures that the optical drive requires to start recording or reading the optical record carrier.
  • the optical drive reduces the time taken to load the optical record carrier into the optical drive.
  • a recorder or player e.g. DVD recorder and/or player, CD recorder and/or player, BD recorder and/or player, or HD-DVD recorder and/or player
  • a successful startup is a critical performance indicator of a disc layer/recorder from the user's perspective. Therefore, when the optical record carrier loading is fast, the user will have a higher satisfaction index of the recorder or player (as compared to slower optical record carrier loading time).

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

L'invention concerne un procédé de chargement d'un support d'enregistrement optique dans un lecteur optique. Le procédé comprend l'utilisation d'un sous-ensemble d'un ensemble de procédures de démarrage initial pour des démarrages ultérieurs. L'ensemble de procédures de démarrage initial comprend des procédures nécessaires au lecteur optique pour démarrer l'enregistrement ou la lecture du support d'enregistrement optique. Le procédé est utile pour des enregistreurs et/ou lecteurs de CD, DVD, HD-DVD et disque Blu-ray. Le procédé réduit le temps de démarrage de disque et améliore l'indice de satisfaction de l'utilisateur.
PCT/IB2008/051857 2007-05-10 2008-05-09 Temps de démarrage du disque d'un lecteur optique WO2008139403A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08763082A EP2147431A1 (fr) 2007-05-10 2008-05-09 Temps de démarrage du disque d'un lecteur optique
CN200880015502A CN101681638A (zh) 2007-05-10 2008-05-09 光学驱动器的盘启动时间
US12/599,357 US20100302923A1 (en) 2007-05-10 2008-05-09 Disc startup time of an optical drive
JP2010507049A JP2010527093A (ja) 2007-05-10 2008-05-09 光学ドライブのディスクのスタートアップ時間

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07107894.3 2007-05-10
EP07107894 2007-05-10

Publications (1)

Publication Number Publication Date
WO2008139403A1 true WO2008139403A1 (fr) 2008-11-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/051857 WO2008139403A1 (fr) 2007-05-10 2008-05-09 Temps de démarrage du disque d'un lecteur optique

Country Status (7)

Country Link
US (1) US20100302923A1 (fr)
EP (1) EP2147431A1 (fr)
JP (1) JP2010527093A (fr)
KR (1) KR20100017674A (fr)
CN (1) CN101681638A (fr)
TW (1) TW200912910A (fr)
WO (1) WO2008139403A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8355305B1 (en) * 2011-07-14 2013-01-15 Disney Enterprises, Inc. System and method for initialization of media asset modules for improved execution sequence on a playback environment

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Publication number Priority date Publication date Assignee Title
EP0418702A2 (fr) * 1989-09-18 1991-03-27 Fujitsu Limited Appareil d'entraînement de disque avec procédure d'initialisation améliorée
US20020009026A1 (en) * 2000-04-28 2002-01-24 Takao Shimamura Servo control apparatus for optical disc player
US20020021633A1 (en) * 2000-05-22 2002-02-21 Takao Shimamura Optical disk reproducing apparatus and setup method
US20020031060A1 (en) * 2000-09-13 2002-03-14 Akira Mashimo Optical disk drive apparatus

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JP2000293857A (ja) * 1999-02-02 2000-10-20 Matsushita Electric Ind Co Ltd 光学式記録媒体、その記録再生方法及び記録再生装置
DE69900582T2 (de) * 1999-02-02 2002-08-14 Matsushita Electric Ind Co Ltd Optisches Aufzeichnungsmedium und Aufzeichnungs- und Wiedergabeverfahren und Gerät dafür
KR20040058295A (ko) * 2001-11-20 2004-07-03 코닌클리케 필립스 일렉트로닉스 엔.브이. 광 디스크 상의 물리적인 위치를 신속하게 접근하는 방법및 장치
JP2003168221A (ja) * 2001-11-28 2003-06-13 Tdk Corp 多層光記録媒体、記録データの記録方法、および記録装置
US6618331B2 (en) * 2001-12-14 2003-09-09 Jia-Horng Shieh Method and apparatus for accessing target data in a data storage medium
JP3838115B2 (ja) * 2002-02-08 2006-10-25 株式会社日立製作所 ディスク装置及び管理情報の読み取り制御方法
EP1533795A4 (fr) * 2002-08-23 2008-10-22 Sony Corp Procede de definition de sortie laser et dispositif d'enregistrement optique
JP2004152398A (ja) * 2002-10-30 2004-05-27 Pioneer Electronic Corp 多層情報記録媒体及び多層情報記録媒体記録再生装置
KR20050003343A (ko) * 2003-06-30 2005-01-10 삼성전자주식회사 정보 저장 매체, 위치 정보의 기록/재생 방법 및 그 장치
JP3940927B2 (ja) * 2003-08-08 2007-07-04 船井電機株式会社 光ディスク記録装置
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Publication number Priority date Publication date Assignee Title
EP0418702A2 (fr) * 1989-09-18 1991-03-27 Fujitsu Limited Appareil d'entraînement de disque avec procédure d'initialisation améliorée
US20020009026A1 (en) * 2000-04-28 2002-01-24 Takao Shimamura Servo control apparatus for optical disc player
US20020021633A1 (en) * 2000-05-22 2002-02-21 Takao Shimamura Optical disk reproducing apparatus and setup method
US20020031060A1 (en) * 2000-09-13 2002-03-14 Akira Mashimo Optical disk drive apparatus

Also Published As

Publication number Publication date
KR20100017674A (ko) 2010-02-16
CN101681638A (zh) 2010-03-24
JP2010527093A (ja) 2010-08-05
TW200912910A (en) 2009-03-16
EP2147431A1 (fr) 2010-01-27
US20100302923A1 (en) 2010-12-02

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